Mortar-mixer.



P. L. BLYSTONE. MORTAR MIXER.

APPLIOATION FILED JAN.15, 1912.

Patented June 18, 1912.

2 SHEETS-SHEET 1.

P. L. BLYSTONE. MORTAR MIXER.

APPLICATION FILED JAN. 15, 1912. Y 1,@30,250,- Patented June 18, 1912.

2 sums- HEET 2.

declare the followin PERRY L. IBLYSTONE, OF CAMBRIDGE SPRINGS, I"ENNSYIZVANIA, ASBIGNOR TO BLYsroNE amnuracruame comm Vania. M

NY, OF CAMBRIDGE SPRINGS, PENNSYL- v oaraa-mxaa.

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Specification of Letters Patent.

PatentedJune 18, 1912.

Application filed January 15, me. serial No. 071,195.

To all whom it may congem:

Be it known that I, PERRY L. BLYs'roNE, a citizen of the United States, residing at Cambridge Springs, in the county of-Crawford and State of Penna lvania, have invented certain new and useful Im rovements'in Mortar-Mixers; and I do ereby tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This in vention relates to machines, for mixing mortar, concrete, and other similar substances, which are provided with paddles for working the material from the ends of the mixing vessel toward its middle part; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed, whereby the efficiency of the mixer is greatly increased.

In the drawings, Figure 1 is a plan view of a mortar mixer constructed according to this invention. Fig. 2 is a cross-section through the mixer, taken on the line ac-w in Fig. 1. Fig. 3 is a detail view of the ejector or separator arms. Fi 4 is a crosssection through one of the e ector blades, taken on the line y in Fi 3. Fig. 5 is a diagram showin tiiree a dles arranged side by side on a s aft, an partially in section, to show the different angles of the various blades to the arms which support them.

The mixing vessel or trough .2 is provided with'trunnions 3 which are mounted to oscillate in the bearings {1 of a supporting frame 5, which is of any approved construction. The mixing trough 2 may be tilted b hand or many other ap roved way. A riving shaft 6 is journale in the trunnions 3, and is provided with a wheel or pulley 7 for revolving it in any approved Way. The lower part 8 of the trough, which is normally below the axis of the shaft 6, is'semi-cylindrical, and upon one side the trou h is provided with a curved extension 9 0 its lower part 8, which operates as a deflector. This extension 9 projects above the axis of the shaft and the shaft is revolved in the di rection of the arrow in Fi 2. The other side portion of the trough is provided with an upwardly and outwardly projecting chute 10, upon which the materials to be mixed are deposited. This chute provides an inclined plane surface down and across WhlCh the materials slide into the lower art 8 of the trough, in which the material are mixed. The materials are carried 11 wardly against the curved extension 9 at tile other side of the trough to a'point whence they fall backwardly y gravit into the bottom part of 69 the trough, and ehind the paddles which are used to mix them.

Three pairs of paddles 12, 13 and 14, are rov1ded and are secured upon the shaft 6. uach paddle consists of a radial arm clamped to the shaft by clarri ing devices 16, and a blade secured to the rec end portion of the arm and arranged at an angle of 38 to the axis of'the. driving shaft. Each blade is flat, and all the blades are arranged at the same angle with respect to the axis of'the driving shaft. This angle of 38 may be varied slightly, but 38 is found to give the best results in practice. The two end paddles 12 have radial arms 18 and mixer and scraper blades 19 secured to the said arms and arranged to scrape the ends of the trough. q

The arms 18 are arranged at the end portions of the trou h and at diametrically op posite points. ach blade 19 is arranged at an angle of 25 to the axis ofqits arm 18. The two middle paddles 14 haveradial arms 20 and blades 21 securedto the arms 20. The arms 20 are arranged at diametrically opposite points and at a ri ht an le to the end arms 18, and each bla e 21 1s. secured to its arm 20 at an angle of 45 to the axis of its arm 20. The two intermediate paddles 13 have radial arms 23 and blades 24, and these arms are arran ed at diametrically opposite points, and intermediate spirally between the arms 18 and 20. Each blade 24 is arranged at an; angle of 35 to the axis of its. arm 23.. p

All the blades are flat and their outer edges are curved so as to correspond with the curvature of the bottom part of the trou h. Each arm has a lug 25 at its free end aving a longitudinal slot 26 m 1t, and the various blades are secured to these lugs by bolts 27 The slots 26 ermlt the dis.- tance between the blades an the trough to be regulated. I

The three paddles at one end port1on of the trough are arranged in aseries w1th the1r adjacent ends arranged In close proximity to and overlapping each other so as to form.

a spiitil conveyer of one direction, and. the paddl s at the other'end trough are arranged in a series in a similar mmmer so as to form a spiral conveyer of the opposite direction, and thereby work the materials from the ends ofthetrough toward its middle part. The two middle paddles are arranged so that the adjacent -end portions of their blades overlap each other of thetrough; The end blades are secured at an angle of to their-arms, and the angles of the blades Hand 21 increase in regular order as they approach the middle part of the trough. More than three paddles at each end portion oflthe troughcan be usedif desired, and when more-than three paddles are used the angles of their blades arms18. The arms 30 project between the middle paddles and at a right angle to their arms 20. The two arms 30 have ejector or separator blades 31 and 52 at their ends, and each-ejector blade is angle-shaped in crosssection. The ejector blades arelboth alike, but they are arranged right and left, so that one face of each blade is in front in the direction of its mot-ion with its face parallel to the axisof the shaft, and its other flange is on the side of it farthest from the middle of the trough. The e'ect'or arms-3O have conical portions '33 in t e angles at the back of the ejector blades which stiffen the said ejector blades andconnect them to the arms. Two similar guard plates 35 are secured to the end portionsof the curved extension 9 of the trou h. These guard plates arecurved similar to t e extension, and a discharge gap 36for the material is formed between them. These guard plates can be changed as required, to vary the size of the gap, and their opposite ends 37 preferably project beyond the ends of the trough. When thetrough is tilted the mixed material. is discharged through the gap 36, into any suitable receiving vessel, and the guard plates 'revent it from being spilled. The materia s to be mixed aredumped onto the receiving chute 10, and they slide intov the bottom of the.

trough without being dumped against the paddles, which aptto injure the blades and cause the material to be jammed in a mass between the-paddles and the side portions of the trough. The paddles are revolved by their shaft and they mix the maportion of the in the same circular path at the middle part I are correspondingly modified, but the angle terials in the trough, working them :onstantly from each end toward the middle of thetrough where the mass'is broken up and parted by the ejector or separator blades and-is allowed to .move backwardly toward' the ends of the trough. The materials are in this manner mixed very thoroughly, and when the mixing operation is complete, the trough is tiltedso that the mixture-is dischar ed through the gap 36 by gravity and by t e action of the ejector blades. The difference in the angularity ofthe mixing blades causes the material to start at each end of the trough at moderate speed and increase-in speed as it approaches the middle 30 of the trough. In this way the material can be mixed more re idly and with less rcsistance thanwhena l the blades are arranged at the same angle to their arms. It is im-" portant that the adjacent end portions of the middle blades should overlap each other in the'same circular path, as the mixing action is then much better, especially when thematerial has been started comparatively slowly at the ends of the trough and worked up gradually to a considerably greater speed at ,the middle of the trough, and when the blades are all arranged'aat the referred angle of 38 with the axis of the riving shaft.

It is referable,v tog'arrange the arms 20 9 of the middle paddles at diametrically opposite points, with the arms'30 midway be-- tween them eircumferentially, but the exact position of these parts may be varied slightly, and each series of arms may be spread around rather more than oneuarter of the circumference ofthe shaft, i desired and as shown in Fig. 3. I

What I claim is:

1. In a mixer, the combination, with a mixing vessel, and a drivingshaftajournaled therein; of a spiral eonveyer secured on the said shaft vand provided with a series of blades arranged at an an leto the axisof the an angle to a line drawn radially of the said shaft, with its outer edge projecting forwardl in the .directionof its motion, and each lade bein arranged at a difierent whereby the motion of the material is accelerated as it is moved longitudinally in thesaid vessel.

2. In a mixer, the combination, with a mixing vessel, and a driving shaft journaled therein; of a series of paddles secured in spiral form to the said shaft and'provided with blades and radial arms, all the blades being arranged at an angle to the axis of the driving shaft, and each blade being also arraiiged at an angle to-the arm which supports it, with its outer edge projecting forwardly in the direction of its motion, eaehblade being arranged at a difierent angle to its arm in regular order, whereby the mosaid shaft, each blade being also arranged at 11 angle to the ra ial' line in regular order, 1115' tion of the material is accelerated as it is moved longitudinally in the saidvessel.

3. In a -mixer, the combination, with a mixing vessel, and a driving shaft j ournaled 6 therein; of two series of paddles arranged in the opposite end portions of the said vessel, and operating to work'the material in reverse directions, said paddles being secured to the said shaft and provided with blades and radial arms, all the said blades being arranged at an angle to the axis of the shaft, and the blades of each series of paddles being arranged at different angles to their arms in regular order, whereby the motion of the material is accelerated-as it is moved by the paddles from the ends of the said vessel toward its middle part. 4. In a mixer, the combination, wit-h a mixing vessel, and a driving shaft j ournaled therein; of two series of paddles arranged in the opposite end portions of the said vessel, and operating to work the material in reverse directions, each series of paddles being secured spirally to the said shaft, and ejector or separator arms secured on the middle part of the said shaft between the two series of mixing paddles and provided with angle-shaped blades the side faces of which are arranged right and left.

5. In a mixer, the combination, with a mixing vessel, and a driving shaft journaled therein; of two series of paddles arranged in the opposite end portions of the said vessel, and operating to work the material in reverse directions, each series of paddles being secured spirally .to the said shaft and the paddles at the middle part of the said vessel being arranged to overlap each other in the same circular path, and ejector or.-

separator arms secured to the said shaft and working in the same circular plane at cal portion below the axis-of the shaftand a curved extension of the said portion above the axis of the shaft on one side of the vessel; of two series of paddles arranged in the opposite end portions of the said vessel, and

operatirfg to work the material in opposite directions, said paddlesbeing secured to the said shaft and arranged spirally and adapted to raise the material against the said curved extension, guard plates arranged at the end portions of the said curved ex tension and forming a discharge gap for the material, and a support for the said vessel which permits it to be tilted upon the axis of its driving shaft.

7. In a mixer, the combination, with a mixing vessel, and ,a driving shaft j ournaled therein; of two spiral conveyers secured on the shaft and arranged right and left so that the material is worked from the ends of the vessel to its middle part, guard plates secured to one side of the vessel parallel to the said shaft and projecting above its top edge and forming a discharge gap at the middle part of the vessel of less length than the length of the vessel, and a support for the said vessel which permits it to be tilted upon the axis of its driving shaft to discharge the material through the said gap.

In testimony whereof I have aflixed my signature in the presence of two witnesses.

PERRY L. BLYSTONE. 

